Previously, Nintendo showed what it called "Mii WaraWara". It's a redesigned Wii Plaza, with Miis clustered around games and leaving messages. Today, Nintendo announced that the final English name for this feature is WaraWara Plaza.

The Miiverse is a "Mii universe" that is the system's redesigned networking and…
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"Warawara" (わらわら) is Japanese for "bustling".

In the WaraWara Plaza, you can see what other games people are playing—and talking about. Besides messages, it's also possible to leave illustrations. Using the Wii U Gamepad, you can touch Miis to see what they are playing and saying.